Exploration of communicating with aliens unfolds on two parallel tracks—listening for signs of intelligence (SETI) and sending deliberate messages into space (METI/CETI)—with SETI using facilities like the Green Bank Telescop… #aliens #greenbank #ovni #planetary #uap #ufo #ufosky #usa #westvirginia https://www.planetary.org/articles/how-do-humans-try-to-communicate-with-aliens